0,0 → 1,122 |
/* |
* Mesa 3-D graphics library |
* Version: 6.5 |
* |
* Copyright (C) 1999-2005 Brian Paul All Rights Reserved. |
* |
* Permission is hereby granted, free of charge, to any person obtaining a |
* copy of this software and associated documentation files (the "Software"), |
* to deal in the Software without restriction, including without limitation |
* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
* and/or sell copies of the Software, and to permit persons to whom the |
* Software is furnished to do so, subject to the following conditions: |
* |
* The above copyright notice and this permission notice shall be included |
* in all copies or substantial portions of the Software. |
* |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
*/ |
|
#include "glheader.h" |
#include "accum.h" |
#include "context.h" |
#include "imports.h" |
#include "macros.h" |
#include "state.h" |
#include "mtypes.h" |
#include "main/dispatch.h" |
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#if FEATURE_accum |
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void GLAPIENTRY |
_mesa_ClearAccum( GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha ) |
{ |
GLfloat tmp[4]; |
GET_CURRENT_CONTEXT(ctx); |
ASSERT_OUTSIDE_BEGIN_END(ctx); |
|
tmp[0] = CLAMP( red, -1.0F, 1.0F ); |
tmp[1] = CLAMP( green, -1.0F, 1.0F ); |
tmp[2] = CLAMP( blue, -1.0F, 1.0F ); |
tmp[3] = CLAMP( alpha, -1.0F, 1.0F ); |
|
if (TEST_EQ_4V(tmp, ctx->Accum.ClearColor)) |
return; |
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FLUSH_VERTICES(ctx, _NEW_ACCUM); |
COPY_4FV( ctx->Accum.ClearColor, tmp ); |
} |
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static void GLAPIENTRY |
_mesa_Accum( GLenum op, GLfloat value ) |
{ |
GET_CURRENT_CONTEXT(ctx); |
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
|
switch (op) { |
case GL_ADD: |
case GL_MULT: |
case GL_ACCUM: |
case GL_LOAD: |
case GL_RETURN: |
/* OK */ |
break; |
default: |
_mesa_error(ctx, GL_INVALID_ENUM, "glAccum(op)"); |
return; |
} |
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if (ctx->DrawBuffer->Visual.haveAccumBuffer == 0) { |
_mesa_error(ctx, GL_INVALID_OPERATION, "glAccum(no accum buffer)"); |
return; |
} |
|
if (ctx->DrawBuffer != ctx->ReadBuffer) { |
/* See GLX_SGI_make_current_read or WGL_ARB_make_current_read, |
* or GL_EXT_framebuffer_blit. |
*/ |
_mesa_error(ctx, GL_INVALID_OPERATION, |
"glAccum(different read/draw buffers)"); |
return; |
} |
|
if (ctx->NewState) |
_mesa_update_state(ctx); |
|
if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) { |
_mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT, |
"glAccum(incomplete framebuffer)"); |
return; |
} |
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if (ctx->RenderMode == GL_RENDER) { |
ctx->Driver.Accum(ctx, op, value); |
} |
} |
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void |
_mesa_init_accum_dispatch(struct _glapi_table *disp) |
{ |
SET_Accum(disp, _mesa_Accum); |
SET_ClearAccum(disp, _mesa_ClearAccum); |
} |
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#endif /* FEATURE_accum */ |
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void |
_mesa_init_accum( struct gl_context *ctx ) |
{ |
/* Accumulate buffer group */ |
ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 ); |
} |